Q1.A particle moves in a straight line and its displacement ,x metres, from a fixed point O, t seconds after passing O, is given by x= 12t - t^3.

(a)calculate the velocity of the particle when it is next at 0. [Ans: -24m/s]
(b)the distance travelled by the particle during the first 3 seconds. [ 23m]

Q2. A particle P travels in a straight line so that its displacement, x metres, from a fixed point O is given by x = 3t^2 - 4t^3 + 60, where t is the time in seconds measured from the start of the motion. Calculate:

the average speed of P over the first 2 seconds.[Ans: 10 1/4 m]



[ Formula to apply; velocity= ds/dt and acceleration = dv/dt]

Please help me on this, i'm so stressed out with this questions.Worse of all it kept repeating in the papers my teacher gave us,caused me to blank all these questions.....TT^TT so please help me on this